1 Dorsal fins are found on the back of the fish. 2  There may be up to three of them. 3  The fish uses this fin for balance in the water and sudden movements. 4  Caudal fins are also known as tail fins.5  This is what we refer to as the fish's tail. 6  Anal fins are on the ventral (bottom) surface of the fish, behind the anus. Dorsal fins are found on the back of the fish. 2  There may be up to three of them. 3  The fish uses this fin for balance in the water and sudden movements. 4  Caudal fins are also known as tail fins.
The oxidation number for phosphorus is +3: four covalent bonds with oxygen atoms yield +4 and the central charge yields -1. The oxidation numbers of oxygen and hydrogen are -2â¦ and +1 respectively. The oxidation number of the overall ion is -1.
The oxidation number of an element in a monatomic ion is the charge of the ion. Therefore, the oxidation number of the sodium ion, Na+, is+1 while the oxidation. number of the chloride ion, Cl-, is -1. 9. The sum of the oxidation numbers in a compound is always zero. 10. In a polyatomic ion, the sum of the oxidation numbers of the atoms is equal to the. charge of the ion. 11. When combined, oxygen is usually assigned an oxidation number of -2. 12. When combined, hydrogen is usually assigned an oxidation number of +1.